<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" /> 
        <title>更新时的一个问题</title>
        <script type="text/javascript" src="../js/vue.js"></script>
    </head>
    <body>
        <div id="root">
            <h2>人员列表</h2>
            <button @click="updateMei">更新马冬梅信息</button>
            <ul>
                <li v-for="(p, index) in people" :key="index">
                    {{p.name}} - {{p.age}} - {{p.sex}}
                </li>
            </ul>     
        </div>
    </body>
            
    <script type="text/javascript">
        Vue.config.productionTip = false // 阻止vue在启动时生成生产提示。

        new Vue({
            el:'#root',
            data:{
                keyWord: '',
                sortType: 0,    // 0原顺序 1降序 2升序
                people: [
                    {id:'001', name: '马冬梅', age: 18, sex:"女"},
                    {id:'002', name: '周冬雨', age: 31, sex:"女"},
                    {id:'003', name: '周杰伦', age: 20, sex:"男"},
                    {id:'004', name: '温兆伦', age: 21, sex:"男"},
                ],
            },
            methods:{
                updateMei(){
                    // this.people[0].name = "马老师"; // 奏效
                    // this.people[0].age = 50; // 奏效
                    // this.people[0].sex = "男"; // 奏效
                    // this.people[0] = {id:'001', name: '马老师', age: 50, sex:"男"};  //不奏效
                    this.people.splice(0,1,{id:'001', name: '马老师', age: 50, sex:"男"});
                }
            }
        })
        
    </script>
</html>